How has President Obama attempted to foster informal ties with members of Congress and how successful have these efforts been?

What will be an ideal response?

Obama meets periodically with congressional leadership but has outsourced much of the congressional liaison work to Vice President Biden. Because of his long tenure in the Senate, he has close ties to many members and has helped create bipartisan compromises on various issues. Although Obama has been criticized for his informal relationship, the use of the vice president to form these ties has met with some success.